Underwater Province Defense?

[JimMorrison]

Sure would be nice if everyone could at least get very basic (indigenous residents) PD underwater. It's hard enough to get into and fight properly in the water, but it's just depressing as hell when your opponent knows they can gobble territory back up with a lone scout or priest with impunity, because he knows nothing is defended.

And I'd go for some drowned sailors and creepy sea creatures that I may or may not have even ever heard of. >.>